I'm not sure if you plan on replacing all 6, or just the rear tires, but if you put the duratracs, or any open shoulder tire on the steer axle, be prepared to rotate them every oil change. Or the tire edge will cup and your tire howl will be even louder.
That wear is only on steer axles though, if you're replacing the drives only, no need to worry about it.
That cupping/frequent rotation is why I normally put the transforce AT on service trucks, because it's one of the few "all-terrains" that doesn't have an open shoulder. So it doesn't require rotations as often.